Question

A 60kg of weight person climbs stairs of total height 20m in 2min.calculate the power

Answer 1

Answer: 40

Explanation:60kg times 2 =120 pounds

power is 40

Answer 2

98 W

Step-by-step explanation:

Power is change in energy over change in time.

P = ΔE / Δt

The change in energy is:

ΔE = mg Δh

ΔE = (60 kg) (9.8 m/s²) (20 m)

ΔE = 11760 J

The change in time is:

Δt = 2 min = 120 s

So the power is:

P = 11760 J / 120 s

P = 98 W